4 Deputy Secretary of the Treasury Kenneth W. Dam served as Acting Secretary of the Treasury from December 31, 2002, to February 3, 2003.

5 Deputy Secretary of the Treasury Robert M. Kimmitt served as Acting Secretary of the Treasury from June 30, 2006, to July 9, 2006.

6 Under Secretary for Terrorism and Financial Intelligence Stuart A. Levey served as Acting Secretary of the Treasury from January 20, 2009, until the confirmation of Timothy Geithner, which occurred January 26, 2009.

7 Deputy Secretary of the Treasury Neal Wolin served as Acting Secretary of the Treasury from January 25, 2013, until the confirmation of Jack Lew which occurred February 28, 2013.

8 Acting Under Secretary for Terrorism and Financial Intelligence Adam J. Szubin served as Acting Secretary of the Treasury from January 20, 2017, until the confirmation of Steven Mnuchin which occurred February 13, 2017.

The former flag of the U.S. Secretary of the Treasury, originating from the 19th century.

As of March 2019, there are eleven living former Secretaries of the Treasury (with all Secretaries that have served since 1995 still living), the oldest being George P. Shultz (served 1972–1974, born 1920). The most recent Secretary of the Treasury to die, as well as the most recently serving Secretary to die, was Lloyd M. Bentsen, Jr. (served 1993–1994, born 1921), on May 23, 2006.